Tanga offers the open-box Asus T-Mobile CellSpot Dual-Band 802.11ac Wireless Gigabit Router for $59.99. Coupon code "ASUS4" cuts it to $55.99. With free shipping, that's $4 under our March mention of a new unit and $24 below the best price we could find for a new one today. It features wireless data rates up to 1.3Gb/s, dual-band support, and prioritizes WiFi calls.
Note: A 30-day warranty applies, but it's unclear who backs it.